$ git clone -n https://src.fedoraproject.org/rpms/flatpak-kcm.git /var/lib/mock/f41-build-side-1-2672203-29192/root/chroot_tmpdir/scmroot/flatpak-kcm
Cloning into '/var/lib/mock/f41-build-side-1-2672203-29192/root/chroot_tmpdir/scmroot/flatpak-kcm'...
$ git fetch origin 8cbeccfe87093db65fefe05d7c742b3f50f15a50:KOJI_FETCH_HEAD
From https://src.fedoraproject.org/rpms/flatpak-kcm
 * [new ref]         8cbeccfe87093db65fefe05d7c742b3f50f15a50 -> KOJI_FETCH_HEAD
$ git reset --hard KOJI_FETCH_HEAD
HEAD is now at 8cbeccf 6.1.90